Synchronization of signals in LTE the primary synchronization signal is broadcast in the last OFDM symbol of slot 0 and slot 10. In the frequency it is located symmetrically in the centre of the configured cell bandwidth. The sequence is 62 symbols long.

Synchronization of signals in LTE

504 different physical-layer cell ids are composed of 168 different physical-layer cell id groups each of 3 physical layer ids within the group

The mapping to resource elements is
- the primary synchronization signal is broadcast in the last OFDM symbol of slot 0 and slot 10. In the frequency it is located symmetrically in the centre of the configured cell bandwidth. The sequence is 62 symbols long.
- the secondary synchronization signal is shifted by one OFDM signal and thus
occupies the second last OFDM symbol of those slots.
- 5 REs are kept empty at each side of the frequency.